Data commit

Task/Ascending-primes/Go/ascending-primes.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+    "fmt"
+    "rcu"
+    "sort"
+)
+
+var ascPrimesSet = make(map[int]bool) // avoids duplicates
+
+func generate(first, cand, digits int) {
+    if digits == 0 {
+        if rcu.IsPrime(cand) {
+            ascPrimesSet[cand] = true
+        }
+        return
+    }
+    for i := first; i < 10; i++ {
+        next := cand*10 + i
+        generate(i+1, next, digits-1)
+    }
+}
+
+func main() {
+    for digits := 1; digits < 10; digits++ {
+        generate(1, 0, digits)
+    }
+    le := len(ascPrimesSet)
+    ascPrimes := make([]int, le)
+    i := 0
+    for k := range ascPrimesSet {
+        ascPrimes[i] = k
+        i++
+    }
+    sort.Ints(ascPrimes)
+    fmt.Println("There are", le, "ascending primes, namely:")
+    for i := 0; i < le; i++ {
+        fmt.Printf("%8d ", ascPrimes[i])
+        if (i+1)%10 == 0 {
+            fmt.Println()
+        }
+    }
+}